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Add 9/70 and 28/81

9/70 + 28/81 is 2689/5670.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 70 and 81 is 5670
  2. For the 1st fraction, since 70 × 81 = 5670,
    9/70 = 9 × 81/70 × 81 = 729/5670
  3. Likewise, for the 2nd fraction, since 81 × 70 = 5670,
    28/81 = 28 × 70/81 × 70 = 1960/5670
  4. Add the two fractions:
    729/5670 + 1960/5670 = 729 + 1960/5670 = 2689/5670
  5. So, 9/70 + 28/81 = 2689/5670

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